Pollen analysis provides a key technique for the reconstruction of post-glacial vegetation. Modern observation of the plant-pollen relationship, through the use of surface pollen studies, is an instrumental process for informing these reconstructions. However, results from surface pollen studies suggest that the diversity of pollen assemblages is rarely a faithful representation of the diversity of the local vegetation. Pollen diversity at high altitude is determined by both the composition and density of the local vegetation and long-distance pollen.

This paper examines the relationship between floristic and palynological diversity using surface samples collected from alpine communities found on three glacier forelands (Austerdalsbreen, Storbreen and Grjøtbreen) in the Jostedalsbreen-Jotunheimen region of Norway. Several diversity indices indicate the complexity of the relationship between palynological and floristic diversity. This is accentuated in open, high altitude, sparsely-vegetated sites, where palynological diversity is a measure of the diversity of the long-distance pollen assemblage rather than the diversity of the local vegetation. Even at sites on older moraines at Storbreen and Austerdalsbreen, where the vegetation is denser and more diverse, the relationship is not simple but depends on pollen production of the taxa that dominate the local vegetation. On Storbreen foreland, for example, the diversity of small, insect-pollinated plants growing locally is poorly represented in the pollen assemblage which is dominated by long-distance arboreal pollen. The surface pollen results were compared with fossil pollen data from a palaeosol at Memurubreen in Eastern Jotunheimen. DCA ordination indicates that the fossil pollen spectra are distinct from the modern samples, due to differences in the pollen assemblages, probably related to lower treelines in the past associated with climatic cooling or human impact. The palaeosol samples are most similar to modern samples from heath and snowbed communities, found on older terrain at Grjøtbreen and Storbreen, and the diversity indices also show strong similarities with these communities. The potential for improvements in methodology to increase resolution is considered.

花粉分析为冰后植被重建提供了关键技术。通过使用表面花粉研究，对植物-花粉关系的现代观察是为这些重建提供信息的重要过程。然而，表面花粉研究的结果表明，花粉组合的多样性很少能忠实地代表当地植被的多样性。高海拔地区的花粉多样性由当地植被和远距离花粉的组成和密度共同决定。

本文使用从挪威 Jostedalsbreen-Jotunheimen 地区三个冰川前地（Austerdalsbreen、Storbreen 和 Grjøtbreen）上发现的高山群落收集的表面样本，研究了植物区系和孢粉多样性之间的关系。几个多样性指数表明孢粉和植物多样性之间关系的复杂性。这在开阔、高海拔、植被稀疏的地点更加突出，其中孢粉多样性是衡量远距离花粉组合多样性而不是当地植被多样性的衡量标准。即使在 Storbreen 和 Austerdalsbreen 的较老冰碛上，植被更密集、更多样化，这种关系也不简单，而是取决于主导当地植被的分类群的花粉产量。在斯托布林前陆，例如，本地生长的昆虫授粉小型植物的多样性在以长距离树栖花粉为主的花粉组合中表现不佳。表面花粉结果与来自东约通黑门山 Memurubreen 古土壤的化石花粉数据进行了比较。DCA 排序表明，由于花粉组合的差异，化石花粉光谱与现代样本不同，这可能与过去与气候变冷或人类影响相关的较低树线有关。古土壤样本与在 Grjøtbreen 和 Storbreen 的较旧地形上发现的来自荒地和雪床群落的现代样本最相似，多样性指数也显示出与这些群落的强烈相似性。考虑了改进方法以提高分辨率的潜力。在以长距离树栖花粉为主的花粉组合中，当地生长的小型昆虫授粉植物的多样性很少。表面花粉结果与来自东约通黑门山 Memurubreen 古土壤的化石花粉数据进行了比较。DCA 排序表明，由于花粉组合的差异，化石花粉光谱与现代样本不同，这可能与过去与气候变冷或人类影响相关的较低树线有关。古土壤样本与在 Grjøtbreen 和 Storbreen 的较旧地形上发现的来自荒地和雪床群落的现代样本最相似，多样性指数也显示出与这些群落的强烈相似性。考虑了改进方法以提高分辨率的潜力。在以长距离树栖花粉为主的花粉组合中，当地生长的小型昆虫授粉植物的多样性很少。表面花粉结果与来自东约通黑门山 Memurubreen 古土壤的化石花粉数据进行了比较。DCA 排序表明，由于花粉组合的差异，化石花粉光谱与现代样本不同，这可能与过去与气候变冷或人类影响相关的较低树线有关。古土壤样本与在 Grjøtbreen 和 Storbreen 的较旧地形上发现的来自荒地和雪床群落的现代样本最相似，多样性指数也显示出与这些群落的强烈相似性。考虑了改进方法以提高分辨率的潜力。本地生长的昆虫授粉植物在以长距离树栖花粉为主的花粉组合中很少见。表面花粉结果与来自东约通黑门山 Memurubreen 古土壤的化石花粉数据进行了比较。DCA 排序表明，由于花粉组合的差异，化石花粉光谱与现代样本不同，这可能与过去与气候变冷或人类影响相关的较低树线有关。古土壤样本与在 Grjøtbreen 和 Storbreen 的较旧地形上发现的来自荒地和雪床群落的现代样本最相似，多样性指数也显示出与这些群落的强烈相似性。考虑了改进方法以提高分辨率的潜力。本地生长的昆虫授粉植物在以长距离树栖花粉为主的花粉组合中很少见。表面花粉结果与来自东约通黑门山 Memurubreen 古土壤的化石花粉数据进行了比较。DCA 排序表明，由于花粉组合的差异，化石花粉光谱与现代样本不同，这可能与过去与气候变冷或人类影响相关的较低树线有关。古土壤样本与在 Grjøtbreen 和 Storbreen 的较旧地形上发现的来自荒地和雪床群落的现代样本最相似，多样性指数也显示出与这些群落的强烈相似性。考虑了改进方法以提高分辨率的潜力。